Meaning of SINE in English

SINE

sine /saɪn/ BrE AmE noun [countable] technical ( written abbreviation sin )

[ Date: 1500-1600 ; Language: Medieval Latin ; Origin: sinus , from Latin ; ⇨ ↑ sinus ]

the ↑ fraction (2) calculated for an angle by dividing the length of the side opposite it in a ↑ triangle that has a ↑ right angle , by the length of the side opposite the right angle

⇨ ↑ cosine , ↑ tangent

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.